An aerial view shows the statue of Mother Homeland at the Mamayev Kurgan (Mamayev Hill) World War Two memorial complex in the city of Volgograd, Russia, July 15, 2015. Russia will host the World Cup soccer tournament for FIFA in 2018. REUTERS/Maxim Shemetov - GF10000159906 ORG XMIT: MOS13

A general view shows Kaliningrad Stadium, the arena under construction which will host matches of the 2018 FIFA World Cup in Kaliningrad, Russia August 28, 2017. REUTERS/Maxim Shemetov - UP1ED8S12ZS7C ORG XMIT: MOS489

An aerial view of a construction site of the new Pobeda (Victory) Arena soccer stadium in the city of Volgograd, Russia, July 15, 2015. Russia will host the World Cup soccer tournament for FIFA in 2018. REUTERS/Maxim Shemetov - GF10000159861 ORG XMIT: MOS09

Zabivaka, the official mascot for the 2018 FIFA World Cup Russia, takes part in a ceremony unveiling a metro train with the interior, dedicated to the history of the FIFA World Cup, in Moscow, Russia November 28, 2017. REUTERS/Maxim Shemetov - UP1EDBS14682G ORG XMIT: MOS351

An aerial view of the city of Yekaterinburg, Russia, shows a large Samsung screen advertising Marks & Spencer underwear, July 12, 2015. Russia will host the FIFA World Cup soccer tournament in 2018 at 11 host cities including Yekaterinburg. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY - GF10000157120 ORG XMIT: MOS25

A general view shows Volgograd Arena, the stadium under construction which will host matches of the 2018 FIFA World Cup, in the city of Volgograd, Russia February 2, 2018. REUTERS/Tatyana Makeyeva - UP1EE221CMN5N ORG XMIT: VOL44

A soccer ball with the sign of the FIFA World Cup 2018 is seen before the Adidas annual news conference in Herzogenaurach, Germany March 14, 2018. REUTERS/Michael Dalder - UP1EE3E0N5CI5 ORG XMIT: INK589

A tram moves along Rozdestvenskay street in the town of Nizhny Novgorod, Russia, July 10, 2015. Russia will host the World Cup soccer tournament in 2018. REUTERS/Maxim Shemetov - GF10000155175 ORG XMIT: NIZ36

Dmitry Svatkovsky, gold medallist in modern pentathlon at the 2000 Sydney Olympics and current deputy governor of the Nizhny Novgorod region, shows a model of the new soccer stadium in Nizhny Novgorod, Russia, July 10, 2015. Russia will host the 2018 FIFA World Cup soccer tournament. REUTERS/Maxim Shemetov - GF10000154926 ORG XMIT: NIZ12

The Rostov Arena stadium, where matches of the 2018 FIFA World Cup will be hosted, is pictured under construction in Rostov-on-Don, Russia March 2, 2018. REUTERS/Sergei Pivovarov - UP1EE3210GH3A ORG XMIT: ROS04

An aerial view of the city of Yekaterinburg, Russia, July 12, 2015. Russia will host the FIFA World Cup soccer tournament in 2018 at 11 host cities including Yekaterinburg. REUTERS/Maxim Shemetov - GF10000156954 ORG XMIT: MOS19